Controller for electric motors.



Patented Jan. I, I90l.

F. W. GARRETT. CONTROLLER FOR ELECTRIC MOTORS.

"(Application filed Sept. 25, 1900.) (No Model.)

a? a W l INVENTOR Q \U BY RQBA WITNESSES I ATTORNEY.

n4: NORRIS ncvcns m. p

UNITED STATES PATENT OFFICE.

FRANK W. GARRETT, OF J OHNSTOWN, PENNSYLVANIA, ASSIGNOR TO THE LORAINSTEEL COMPANY, OF PENNSYLVANIA.

CONTROLLER FOR ELECTRIC MOTORS.

SPECIFICATION forming part of Letters Patent No. 665,087, dated January1, 1901.

Application filed September 25, 1900. Serial No, 31,068. (No model.)

To aZZ whom it may concern: with a reduced cylindric extension f, whichBe it known that I, FRANK W. GARRETT, of is removably engaged by thesocketed hub of J ohnstown, in the county of Oambria and thehandle E.Said sleeve is also formed with State of Pennsylvania, have invented anew an inverted -cup like flange f, which fits 55 and useful Improvementin Controllers for loosely over a boss a, surrounding the aper- ElectricMotors, of which the following is a ture, and forms a water-guard.

full,clear, and exact description,reference be- G is a lever pivoted atg to a suitable fixed inghad to the accompanying drawings, whichsupport, which in the present instance is an form a part of thisspecification. extension II of the bearing H for the reverse- 60 Myinvention has relation to controllers for switch shaft 0. One arm ofthis lever carries electric motors, and is designed to provide anantifriction-rollerg, which is arranged to means of simple and effectivecharacter for be impinged bya cam I, carried by the shaft preventingimproper operation of the reverse- B of the regulating-switch. The otherarm switches thereof. of said lever is forked to embrace the sleeve 65With this object in view my invention 0011- F, a groove f of which isengaged by pins or sists in the combination,witha reverse-switch studs2' of the lever-forks. and its operating-handle, of aguard-plate ad- Jis a spring arranged to act on the lever jacent to said handle and meansfor bringing G in opposition to the cam I. together and separating saidguard-plate and K is a segmental plate or table underneath 7o handle atpredetermined times, said handle the handle E of sufficient circularextent to and plate being so constructed and arranged include the entirerange of movement of the relatively to each other that when broughttohandle and of a radius equal to the length of gether the handle cannotbe grasped for practhe handle. This table is raised somewhat ticaloperation. above the controller-top, With which it may 7 5 My inventionfurther consists in means be integrally cast, and has a central openingwhereby the separation of the guard-plate and 70 to receive the hubportion of the handle, the handle is made dependent upon the positionlatter having a circular flange E, which norof the regulating-switch ofthe controller, mally fits within and closes the said opening. wherebysuch separation occurs only when The handle E consists of a shortcompara- 8o the regulating-switch is at its off or open-cirtively thinpiece having a flat under surface cuit position. adapted to lie closelyon the surface of the My invention also consists in the novel conplateor platform K and an upper surface of struction and combination ofparts, all as oval convex form. When lying fiat upon the hereinafterdescribed, and pointed out in the table or platform K, it is thereforepractically 85 3 5 appended claims. impossible for it to be grasped withsufficient In the accompanying drawings, Figure 1 is force to enable thereverse-switch to be opera plan view of a controllerembodying my inated,and it remains in this position at all vention. Fig. 2 is a verticalsection on the times save when the regulating-switch is line 2 2 of Fig.1, and Fig. 3 is a section on moved to off position, when it isautomatically 0 4.0 the line 3 3 of Fig. 1. raised sufficiently awayfrom said table or In the figures the letter A designates the platformto enable it to be easily grasped by top of the controller-casing, B theshaft of the the hand, this being effected by the action ofregulating-switch, and C the shaft of the rethe cam I and lever G, thelatter being actuversing-switch. ated by the former to raise the sleeveF. As 5 D is the handle for the regulating-switch, soon as the handle Dis moved from the off and E is the handle of the reversing-switch.position the cam I ceases to act on said lever,

F is a sleeve which is placed on the upper and the sleeve F and handleare returned to portion of the shaft 0 to rotate therewith, but normalposition by the spring J, assisted by to move loosely thereon in avertical direcgravity. When the handle is in its raised po- :00

tion. This sleeve extends up through an sition, a flange F on the sleeveF takes the aperture CLlIl the controller-top and is formed place of theflange E and closes the opening 70. E is a lug on the hub portion E,whereby said handle is prevented from being removed when in its raisedposition unless the reverse-switch is first moved to 01$ position, atwhich position removal is permitted by reason of a slot 7." in the tableor platform K. Said lug passes through a slot in the flange F and by itsengagement with the walls of this slot forms the operative connectionbetween said handle and sleeve.

It is obvious that many changes in detail may be made without affectingthe spirit and scope of my invention as set forth in the appendedclaims. Various mechanical devices may, for instance, be used to impartvertical movement to the sleeve and handle, or the same may be effectedelectromagnetically, or the handle may be stationary and the guardplateor platform be moved vertically into and out of contact therewith, ifdesired. Hence I do not wish to limit myself to the particularconstruction, arrangement, and combination of parts which I have hereinshown and described. I do not, however,claim,broadly,meansforpreventingoperative access to the handle of thereversingswitch unless the regulating-switch is in a predeterminedposition, as I believe that to be the invention of George H. Parmelee,of Johnstown, Pennsylvania, as described and claimed in his pendingapplication, Serial No. 24:,782, filed July 25, 1900.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. In an electric switch, the combination of a switch-handle, aguard-plate adjacent to said handle, and means for bringing together andseparating the handle and plate, said handle and plate being so arrangedrelatively that when brought together, the handle cannot be grasped forpractical operation.

2. In an electric switch, the combination of a switch-handle, aguard-plate adjacent to said handle,- and means for bringing togetherand separating the handle and plate, said handle being shaped so thatwhen the handle and plate are brought together, the handle cannot begrasped for practical operation.

3. In an electric switch, the combination of a switch-handle, aguard-plate underneath the said handle, and means for moving said handleinto and out of engagement with the said plate, said handle and platebeing relatively arranged to prevent the handle being grasped forpractical operation when in engagement with the said plate.

4:. In an electric switch, the combination with a guardplate, of acomparatively thin and flat switch-handle arranged to lie closely to thesurface of said plate, and means for effecting a separation of saidhandle and plate under predetermined conditions.

5. In a controller for electric motors, the combination with aguard-plate, of a switchhandle arranged to lie closely to and projectbut slightly from the surface oi the said plate and means for effectinga separation of said handle and plate.

6. In a controller for electric motors, the combination of aregulating-switch, a reverseswitch, a handle for the reverse-switch, aguard-plate underneath the said handle, and means for moving said handletoward and away from said plate controlled by the regulating-switch,said handle and plate being shaped and arranged relatively to each otherto prevent the handle from being operatively grasped when in its nearestposition to said plate.

7. In a controller for electric motors, the combination ofaregulating-switch, a reverseswitch, a vertically-movable handle for thereverse-switch,a guard-plate underneath said handle, means for holdingsaid handle normally in close relation to said guard-plate, and meanscontrolled by the regulatingswitch for effecting the separation of saidhandle and plate.

8. In a controller for electric motors, the combination of aregulatirig-switch, a reverse switch, a vertically-movable sleeve on theshaft of the reverse-switch, having a seat for an operating-handle,ahandle detachably engaging the said sleeve, and movable therewith, aguard-plate underneath said handle, and means for raising and loweringthe said sleeve controlled by the regulating-switch, said handle andplate being shaped and arranged tc prevent practical operative grasp ofthe handle when in certain relation to each other.

9. In a controller for electric motors, the combination with thecont'roller-casing, and the regulating and reversing switches mountedtherein, of the raised guard-plate or platform on the top of said casingaround the reversing-switch shaft, the vertically-movable sleeve on thesaid shaft, the handle having a detachable engagement with said sleeve,and constructed and arranged in one position of said sleeve to lieclosely to the surface of the said plate, and means for actuating thesaid sleeve.

10. In a controller, the combination with the regulating and reverseswitches, and the casing therefor having an opening at its top aroundthe reverse-switch shaft, a raised boss around the said opening, andalso a raised platform or plate above and around the said boss, saidplatform having an opening over the said opening in the casing, of thevertically-movable sleeve on the reverse-switch shaft having a seat foran operating-handle, and also a flange arranged to fit over the saidboss and also to close the openingin the said platform.

11. In a controller for electric motors, the combination with the casinghaving the open ing at its top, and the raised platform also having anopening above the first-named opeir ing, of the vertically-inovablesleeve on the reverse-switch shaft having a seat for anoperating-handle, and also a guard-flange arranged to close the openingin said casing, and also, in one position of the said sleeve, theopening in said platform, a handle having a flange also arranged toclose the opening in the platform in another position of the saidsleeve, and means for raising and lowering said sleeve.

12. In a controller for electric motors, the combination of acontroller-casing, regulating and reverse switches mountedtherein, meansfor operating the regulating-switch, and a guard-plate on the top of thecontroller-casing, of a vertically-movable sleeve on the shaft of thereverse-switch, a handle ar- FRANK WV. GARRETT.

l/Vitnesses:

BLANCHE M. SMITH, H. W. SMITH.

